AutoBuilder - Minecraft Fabric Mod

Automatically gathers materials and builds structures from .schematic (Schematica) files using Baritone.

Requirements

Minecraft 26.1 (Java Edition 2026)

Minecraft 1.21.8 (alternative)

Setup

1. Get Baritone API jar

For MC 1.21.8 (default): Download baritone-api-fabric-1.15.0.jar from the official releases and place it in libs/.

For MC 26.1: Download a community Baritone API build from issue #5011 or build from PR #4990. Place the jar in libs/.

2. Configure version

Edit gradle.properties:

• MC 1.21.8 (default - builds with Java 21):

  minecraft_version=1.21.8
  fabric_api_version=0.115.0+1.21.8
  loader_version=0.16.14
  java_version=21
  

• MC 26.1 (requires Java 25):

  minecraft_version=26.1
  fabric_api_version=26.1.0
  loader_version=0.18.4
  java_version=25
  

  Also copy gradle/wrapper/gradle-wrapper-26.1.properties over gradle/wrapper/gradle-wrapper.properties.

3. Build

./gradlew build

The built mod jar will be at build/libs/autobuilder-1.0.0.jar.

4. Install

Place the mod jar, Fabric API jar, and the Baritone API jar into your .minecraft/mods/ folder.

5. Place schematics

Put .schematic and .schem files in .minecraft/autobuilder/schematics/.

Commands

How it works

1. Load: Scans .minecraft/autobuilder/schematics/ for .schematic/.schem files
2. Analyze: Counts every required block type in the schematic
3. Inventory check: Compares requirements against your inventory
4. Gather: For missing blocks, uses Baritone's MineProcess to auto-mine them
5. Build: Once all materials are gathered, uses Baritone's BuilderProcess to place blocks

Architecture

autobuilder/
├── src/main/java/com/autobuilder/
│   ├── AutoBuilderMod.java      # Fabric entry point, tick/command registration
│   ├── command/
│   │   └── AutoBuildCommand.java # /autobuilder command tree
│   ├── builder/
│   │   ├── BuildManager.java    # Orchestrates gather-then-build pipeline
│   │   ├── BuildJob.java        # Tracks a single build operation
│   │   └── BuildState.java      # State machine (IDLE→ANALYZE→GATHER→BUILD→DONE)
│   ├── gather/
│   │   ├── MaterialManager.java # Inventory checking & auto-mining
│   │   └── MaterialRequirement.java # Block requirement model
│   ├── schematic/
│   │   ├── SchematicManager.java # Loads & caches .schematic files
│   │   └── SchematicInfo.java   # Schematic metadata
│   ├── config/
│   │   └── AutoBuilderConfig.java # Mod configuration
│   └── util/
│       ├── BlockCounter.java    # Scans schematics for block counts
│       └── InventoryHelper.java # Player inventory query utils
├── build.gradle
├── settings.gradle
├── gradle.properties
└── gradle/wrapper/
    └── gradle-wrapper.properties